Although I'm very interested in your "Chorded Typing" article [0], I too admit to being confused by the article listed here on HN.
Personally, I've roamed the world with a Galaxy Tab 2 7" (3G version) on rooted Android 4.x. I used a mini USB keyboard, and developed quite a bit of software on it (mainly nodejs at the time, but not exclusively). I upgraded the system in 2013 to a MBA (better battery, bigger screen, prettier OS IMHO, but lost mobile data), & didn't continue with it. Fun times.
[0] http://tbf-rnd.life/blog/2019/06/16/0-learning-curve-chorded...